Resources

This is almost always insufficient adhesive coverage. Apply a continuous bead across the full back of the panel rather than a few dabs — thin or patchy adhesive won't hold the panel's weight through temperature swings.

Yes. Leave a small expansion gap at every joint instead of butting panels edge-tight. Polyurethane expands and contracts slightly with temperature, and a tight-fit installation can bow the panels or pop the interlock over time.

An uneven substrate is the usual cause. Adhesive cannot bridge gaps or high spots on the wall surface, so confirm the substrate is flat and dry and patch any low spots before you start fixing panels.

Cut with the textured face up and let the saw or utility knife blade exit through the back face. Cutting face-down forces the blade out through the textured surface and chips the edge.